<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Netty WebSocket 时间服务器</title>
</head>
<body>
<script type="text/javascript">
    var socket;
    if (!window.WebSocket){
        window.WebSocket = window.MozWebSocket;
    }
    if (window.WebSocket){
        socket = new WebSocket("ws://localhost:8888/websocket");
        socket.onmessage = function (event) {
            var ta = document.getElementById('responseText');
            ta.value = "";
            ta.value = event.data;
        };
        socket.onopen = function (event) {
            var ta = document.getElementById('responseText');
            ta.value = "打开WebSocket服务正常，游览器支持WebSocket!";
        }
        socket.onclose = function(event){
            var ta = document.getElementById('responseText');
            ta.value = "";
            ta.value = "WebSocket 关闭！";
        }
    }else {
        alert("抱歉，你的游览器不支持WebSocket协议！");
    }
    function send(message) {
        if (!window.WebSocket){
            return;
        }
        if (socket.readyState == WebSocket.OPEN){
            socket.send(message);
        }else {
            alert("WebSocket链接没有建立成功")
        }
    }
</script>

<form onsubmit="return false;">
    <input type="text" name="message" value="Netty最佳实践">
    <br>
    <br>
    <input type="button" value="发送" onclick="send(this.form.message.value)">
    <hr color="blue">
    <h3>服务端返回的应答消息</h3>
    <textarea id="responseText" style="width: 500px;height: 300px;"></textarea>
</form>
</body>
</html>